Just to note: Graphite aerogel is one of the worst anti-laser armors in the game. Silicon aerogel is one of the best. I keep seeing people using graphite aerogel to armor against lasers -- if you do that, you are going to have a bad time. (reason: graphite aerogel has great thermal conductivity, silicon aerogel has nonexistent)
My first attempt at a nuclear reactor, do you think this is any good? Some of the reactors other people have been talking about sound amazing. So, I'm going to attempt to make one until I eventually succeed. EDIT: It seems pretty terrible, comparing it to a stock reactor.
The primary problem is that your secondary cooling loop is really anemic, and you are making up the difference by using a gigantic thermocouple. This is a problem because Tantalum and Tungsten are really expensive compared to the cost of a better cooling loop. Keeping the actual reactor core the same, I'd cut the thermocouple down to r:2.5 h:5.6, then fix up the heat problems by switching outer coolant to sodium and tweaking the outer pump until the core won't melt.
I am not convinced that you could remain pin point accurate at 250km.
You'd be wrong. The hubble space telescope has a precision of 0.007 arcsec. This means that at 250km, the telescope will not wander more than 0.025mm from it's aiming point. That is smaller than the diameter of a human hair.
The game chooses to have all turrets rotated with momentum wheels. This has drawbacks in making large turrets really expensive to turn, with most of the weight of the turret in the reaction wheels. However, reaction wheel systems can truly be crazy stable and precise.
2. One can cover an armoe plate with diamond crystals, but making a diamond armor plate or a diamond turbopump is just not plausible.
There is a CVD process of depositing diamond on a surface. You can buy 2mm thick diamond disks right now, and the only limiting factor in thickness is that the diamond only grows at a rate of ~1 micron per hour.
I think the secret to a good KKV is that is gets a running start: so the final impact represents the full 5k m/s rather than (say) 1k or 2k. As somebody else pointed out, this is limited in-game to the maximum engagement range of the enemy. So, if your enemy has short-range weapons, you KKV's will not be as useful lol
You can freely set the engagement range of a laser. So you can make a really low-powered laser with 250km range, call it targeting laser for immersion, and have your ships always engage at 250.
It seems a bit strange to me that the nukes are not capable of killing crews with radiation Also from the effect of the nukes I guess that the thermal radiation are not taken into account too
What makes you think so? I think both neutron radiation and thermal radiation from nukes are modeled. Thermal is very easy to verify, just pop enough nukes nearby and the ships you are shooting at melt. Neutron radiation doesn't usually come in play, but if you armor your ships with armor made of heavy elements (including the armor internal to the crew quarters), nukes can pop the crew quarters without destroying the armor first.
The reason you don't notice crew-killing radiation usually is that the primary armor materials, including all the ones used in stock crew moduels are really good at blocking them. And the neutron flux of the best bombs in the game is not very powerful, as you cannot build proper neutron bombs.
For the same thickness it is definitively true. I did not do a comparison between them with equal mass, but graphite is 10 times lighter than silica. Thats allot, if silica is 10 times more effective then there is a argument to make, if not well them...
For anti-laser work, silica aerogel is not 10 times more effective. Based on my tests, it's more like 10000 times more effective. Yes, really.
The advice for high trust deuterium thrusters for dreadnoughts is "don't". Deuterium, or hydrogen-deuterium are great propellants for civilian ships, but the instant you want to armor the ship, the density of the fuel matters as much if not more for delta-V as the exhaust velocity. Hydrogen/deuterium are so light that ships carrying them either have minimal armor, or terrible delta-V.
Instead, look at methane and decane. They are IMHO the sweet spot for warship propulsion, having reasonably high exhaust velocity, and reasonably good density.